Alternating assembly structure of the same dye and modification material in quasi-solid state dye-sensitized solar cell

Abstract

Only one sort of dye and a dye-modification material is used to form an alternating assembly structure in dye-sensitized solar cell. The alternating assembly can increase the adsorption of dye sensitizer, prohibit the aggregation of the dye, and retard the recombination reaction. These effects are investigated by ultraviolet–visible spectrum, Fourier transform infrared spectrum, transient photovoltages, current density–voltage characteristics and dark current measurements. The photon–electron conversion efficiency of the cell with alternating assembly structure rise by 16%, from 3.86% to 4.49% under AM 1.5 irradiation. And the stability of the cell is also improved.